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Refactor fillGradientRectangle to avoid DPIUtil.autoScaleDown() #2284

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Refactor fillGradientRectangle to avoid DPIUtil.autoScaleDown() #2284

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12 changes: 9 additions & 3 deletions bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/graphics/ImageData.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2616,9 +2616,15 @@ static void fillGradientRectangle(GC gc, Device device,
RGB fromRGB, RGB toRGB,
int redBits, int greenBits, int blueBits, int zoom) {
/* Create the bitmap and tile it */
ImageData band = createGradientBand(width, height, vertical,
fromRGB, toRGB, redBits, greenBits, blueBits);
Image image = new Image(device, band);
ImageDataProvider imageDataProvider = imageZoom -> {
float scaleFactor = imageZoom / 100.0f;
int scaledWidth = Math.round(width * scaleFactor);
int scaledHeight = Math.round(height * scaleFactor);
return createGradientBand(scaledWidth, scaledHeight, vertical, fromRGB, toRGB, redBits, greenBits,
blueBits);
};
Image image = new Image(device, imageDataProvider);
ImageData band = image.getImageData();
if ((band.width == 1) || (band.height == 1)) {
gc.drawImage(image, 0, 0, DPIUtil.pixelToPoint(band.width, zoom), DPIUtil.pixelToPoint(band.height, zoom),
DPIUtil.pixelToPoint(x, zoom), DPIUtil.pixelToPoint(y, zoom), DPIUtil.pixelToPoint(width, zoom),
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